Timer for weft detectors of box looms



Jan.- 31,. 1933. L. s. VOSE TIMER FOR WEFT DETECTORS OF BOX LOOMS 2 Sheets-Sheet 1 FiledMarch 22,

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Jan. 31, 1933. L. s. VOSE TIMER FOR WEFT DETECTORS OF BOX LOOMS Filed March 22, 1952 2 Sheets-Sheet 2 =9nu ent or (Lttornegs iewis 5 Uos e M SN Patented Jan. 31, 1933 UNITED- loFj ice v mnwis s. vos or NEEDHAM, iv'mssheirusnr'rs;hssmnon immense KNOWLES;

we-Rxs, or wononsrnn, MASSACHUSETTS; A coRioRA'rIoN or MAssA-oH-U- v .7

SETTS Application filed March 22; 19 32. .Ser'ia;1-No.".600, 47Q.

.'l.hi-s.inwfi11=tion;rclates to imp tenients in weft detecting mechanisms :for box looms, and V .actiyc'and-either ator on its Way toward the magazine end -,0EE the 100111.. In that apply.

catio the knock-elf or actuator is efiectiy by its gposition and the time. of its-working stroke to prevent loom; stoppage as soon as the detecting circuit is closed, there being a cam or the like which determines .the move- :ments ofthenetuator a In cent ain types looms, especially; those weaving grades of cloth, it iswdesirahle to prevent the lay afrombeating theztell of the cloth when the fi l-ling ais detectivgi and W111 fi ppcfi 'iasithei description proceeds, my

:in someinstan e -Operator preier-go stop the loom in time to prevent .a second Joeat of the reed againsta pi k; il l ing, "To-accomplish ithis iresult the brake, is frequently set to stoptheloomqu-icklyrg i 1 the. .so-called Stafiord type of shuttle changer loom the Jay is brought .to rest to .nism of course being employed to stop the lay in proper position :Eor .;thechange. Since -cincuit will already-sham been closed, thus causing the loom to stop two picks too soon. It :is an impontantrohject of my present invention .to render thetiming .otf i the knockoflior actuatorworkingstroke independent I of thepclosnre-oi the detecting circuit, the purpose {of this relation being .to ermit the actuator to; be timed. most ia ora'b y wit itle changerijdevices." z; 1

;cmnectionv w en, yet ittis equallynse lin thosel om Where transter of" a bobbin or ehangingof a 1 maM-Enronwnm DETECTORS os- Boxiboims the titular -loo'm to which. the detecting- 'mech nism is'applied. Accordingly, I'proN-idc two j open-p ints in th 1@ ecting circuit ne ofv which is toibe closed at indication o5t-weftofi exhaustion by 'a' weft feel'er contaeting with .a depleted nact ve sh ttle, :and the other. point being closed;period cal yand sufficiently ate ainthe cy leofithe k oornito awe d prematur s oppingof .the100m- Byxth "use of 5 11 01 P90 hanisin :as'set afohthqherein the; Weaver is free to gad iust the ,jstopping) ofjethe iloo n clue to warp eakage, or;instancaaw t ont interte -11 g with-the or ectioperationofthe shut- O05 .While the inventionfhasiheen.setforth-in 1th a loom which .stopsiiat trans shuttle takes place whil-ethe loom is winning; the gknock-off in such looms .being'replaced w ycan actuator which efiects the change. In either type of loom the desirable feature of being able toiadjutthe closing of the circuitand the beginningoi the changing structure 515 ,jinclenendently oct each 7 other is retained.

firth these and other objectsin :vimr which "imaention resides in the combination: and

. arrangement of parts hereinafter described 63 andrsetaforth in =the c1aims;,'

I Ingthe accompanying drawings, whereina convenient embodamentaofmy'lnyention1s 1 ".SBf'ZfiOltiL'. A 1 effect change of shuttles, the .brakerneohw 1 Fig.1 i513. side elevationoif aportion1ofa 5 loom pnovidedi withymy invention,- Fig.2 is a diagrammaticwiew of the electric icircuits 1 (employed in my. invention,

Fig. 3 is. a front elevation of the end of-the loom-having any detecting mechanism, 1' Figs. 4, 53nd 6 arediagrammatic views of the operating :partsiin different positions,

FigiT is a time diagram showing Ethe tiniing of the various motions in relation to the crank-shaft J g j. V Referring to the drawings, the-loom-frame v10,,breast heamll, crankshaft :12, bottom shaft 13, .ope rating athalfthe speedofgtfhe .114: ay-15am 1 crank; ;shaft, ylay sword ammo shown in. Fig. 6. Ther'esult of last action is to rock the knock-off lever 40, whereupon a change occurs, such as described in my aforesaid application.

Should exhaustion occur in the bottom shuttle, the circuit :traced :willzbe the same, except that the lower Fneedles and :wires 70 and 71 are in circuit instead 30f the corre sponding parts associated. with the other circuit. 1

Ihe cam 50' closes the circuit .sufiicientl-y long prior :to breaking at the shuttle to per Imit operation of the devices. The timing of the cam :50 can be set to accommodate the actuator, holding the latch raised :until ';the actuator engages it. If-(desired, however, -.a shunt circuit may be used to hold the electro-magnetic device energized until the shipper handle breaks :the cincuitwat, switch 37. This shunt .circuitincludes wire75,'1ever 76 which lifts thelatch, coreof the magnet '7 7 which has metallic contact Wilthlthfi lever, wire78, and ground. Engagement of lever "7.6 with :the'core 77 wi11 close the following circuit: Battery 65,, wire 64, switch 37, wire 64, device 38, wire 163, wire 15.,lever 76,;core 77, wire 7 8-to ground, and up from the ground overwire 66 back to the battery. Current in thiscircuit will maintain the device 38 energized regardless of the condition of :the detector switches, or the cam operated switch at plate-51; p

"It is to be understood that the timing of v the several control elementsor members is such that although the detector switch. is

closed as soonas, oreven before, an-exhausted shuttle is shitted to inactivekposition, yet

the actuator will have passed beyond. the notch in the latch .39 ibefore ucam :50 closes the circuit'at the contact'plate. 0n the lpick when the empty shuttle ismoved to inaction, therefore, thejlever' 40 cannot bevrocked,

this result occurring on the second pick there-- after, or when the depleted shuttle'is again picked to theicha'nging sideofthe loom. The

these two points, this interval being sufi'i- 'ciently long to permit :the actuator to pass the notchof the latch 39 on its Working .or knock-ofi stroke before the circuit :is closed atits second point. The relationlofthe parts is such that the interval will afford time tor foregoing it will be seen that I v adjustments which are likely to arise 1connectiomwith the actnatoriand ibra'ke unech- :anism. The shuttle "which is moving ate-ism. active position gives indication 'iweifit' lexhaustion, but this indication is not efieottve zto Jon'ing about a change inzthe loom operaftion' the shuttle is again lactive due :to the timing of the :partsdescribed. o

previously raised inactive :cXhamstedZshu-ttile 1 movesidown through the iposition shown in Fig. 5 itowandthe position fillggestedaby arrow :in Fig. 6., the parts. will he so related that the loom will vhe gstopped as the lay reaches *baok center on the :pick accompanying restoration of the depleted shuttle into action. I. v

Having thus described my invenhioniit will .be seen that changes and modifications may :be made therein by those-skilled in the art without departing from the spirit and scope .of the inventionand I=.;. d0 not, 'NViShWiJOgbB limited to the details what I claim is:

herein e ens a es l 1. In weft detectingQmechanism ErClooms havin shuttle boxes which shizft every other for each boxrendered operative by ibQX Sh ft.-

itle when the same moves 'to liiinacfiivie. eosition, an actuator having-a'rrlegular working stroke every second pick .oif the 10911111,? members he engaged by thcan'tuaztoi' xaz stroke to stop itheloomiand :initiateWefbne" :plenis'hment', a" normally open switch, g:

'larly acting means {to iclosc'ithezswiitch afte the actuator has passed their-member one same into operative relation! wiit-h;,'-the a tuator,- -and.an electric circuit includingth'e deupon closure .Qlf'. device. I

42. In 'weiit detecting 'ihavin'g shuttle ibOXGS which shifteveny other shuttle when the latter-is moved: to inactive position, an. actuatorhaving 1aregularly-re curring "working strokectcny zalterm'tfi pick of the loom, a imemtber. to ,be enjgaged by the actuator on a working "stroke and fmovable to control the member aaindfvtend to movethe V ethereby to effect .a =1ohange .in loom operation,

and a negu'larhv moving element reflective at the actuator passes the member ion a working stroke to coact with athe detector and, cause movement of ithe member toward t'he' path of. movement of the actuator. j a

3. In weft detecting mechanism fonfaloom j having shuttle boxes which sh if-t every alters natezpick of the loom 991 6.111 lay movable-back land :Eorth, a detector'forieach shuttle box rendered operative by shitting mnovementkof "the boxes, each detector -operat-1ve;zt0; etect vice, switch and axdcte cto saac d dependent the switch @jnofgizetho I who a"- given point in the cycle oft-the loom a'fiter w j e:a-etuatorto-ibezmoved by the lattero'n' th a 7 itro-magneticdevi'ceandydetector,-said circuit 1 "the condition of Weft'in' thecorrespo'nding shuttleduring'the latter part of the shifting movementof the b oxes whichrenders said shuttle inactive, a regularly moving actuator -havfing a working stroke occurring on the o backward movement'of the lay, a member to ioperatively related 7 to the actuator and limovable by the latter on aijworking stroke thereof to effect a change inloom operation,

7 9 and' anelement'nornially ineffective to co-act thelatter part 'of the shifting movement of 2 theboxes, an-actuator havingaworking stroke" occurring regularlyon alternate beats of the loom, a'-f latch capable of. coaction with the actuator to efiectachange inloom' operation,

but; normally} out of thev-pa-th of movement of "the lja tter, an 'electro-magnetic' device to f movethe latch toward the'path of movement of the -"actuator,j, a timing switch-*- normally openbut closing OnaIternate beatS of the lay 7 after the actuator has passed the latch, and

' and the felectro-magnetic device and a weft detector, saidcircuit dependent upon the "closing-ofvethe timing switch to energize the "electro magnetic device, the actuator being renderedtherebyeffective on its next working stroketo -engage the latch; ;5.: I nfweft detecting mechanism foraloom operating with shifting'fshl'fttle boxesf'each canz zactuator having -'a regularly *working str'oke every other pick of the loomiat 'a given time, any electro-magnetic device, an element 7 'co ntrol'led bylth'e latter and movable thereby when-energized'zinto 'the path of movement of workingrstroketo effect a change" in loom 7 operation; an e'lect'rici weft" detector vfor each box; efl'e'ctive to indicateexhaus tion when the clo'sing at regular intervals, thefactuator mov where' -iti-can be operatively related to the member before the switch is closed, and an electric circuitin'cluding the switch and elecdependent for closure :1 and effectiveness to energize; the device upon indication of weft "exh'austion by the detector. I

V In weftdeteQting mechanism for a loom j "an electriccircuit including thetimingrswitch atori: has. passed the, .element r on" a'lworking i OffWhiChiSfiCtlVfOI but tw'opicks at'a time, M

vstroke andduringa rangeofftime extending corresponding shuttleis depleted and in inactive positiomiand a normally! open switch having shuttle boxeswhi'ch shift on 51am picks ofthej-loomto render one ofthe shuttlesinactive and the other shuttle active, an electric detector for-eaehishuttle, eachdetector ,to coact with the corresponding shuttle when moving to inactive position duringthe latter part of the shifting movement .of the movement of the latter, an electro-magnetic device to move the latch toward. thepath of V movement of .the actuator, awtiming. switchs0 normally open but closing" on? alternatebeats of the lay afterfthe actuatorfhas passed the latch, and an electric circuit includingthe timing switch and the'electro-magnetic device andaweftdetector, said circuit dependent upon the elosingof the ztiming switchto energize the electrormagnetic"device; the vac-V tuator being'rendered thereby'efl'ectiveon its next working stroke to engagethelatch, said actuator: capable of engaging-.the member[at any one of j a -.plurality,of points inthe cyc1e 9 of the m prior to the closing ofsaid switch.

. 7 In a loom having a lay movablejback and forth and provided with shiftingshuttle 1 bo'xes'each s-iinuactiveposition for..but tvvo picks at' a time, the boxes shifting when the lay is in forward positiomlan electricwef-ti' detector brought into detecting relation with a box in .inactive position-by shifti-ngof the boxes,aniactuator-having: a working strokev during thepick when the boxes rshift; and

106,1 foperable through a range oftime-rterminating whenxthe" lay reaches firearm-0st position followlngabox shift, anelement normallyc out 1 ofithe' pathhof the actuator: andvm'ovable by the ilatterlto'effe'ct. a;.'c;hange' rin f;-thel-operation of the loom, an ;electro5mag-neti0 device actuator, a switch 'closable'afterfthe /-act'u to then'extxshiftingzofZthe boxes, and"a cir:

ito move 5 thexelement Pinto lthe path of the; 7

cuitjincluding the. switchsand device and"v closable a hELllStiOn i I 4 .j r v 1 c 8; In a loom having a lay mov'able back and forth and provided with shifting shuttle :detectorindicating weft exbrought into detecting relation with afbo'x in inactive position shifting of theboxes, an

- .-boxes eachin active position for buttw'o picks at a time, the boxes shiftingiwhen the layiis V f :in forward position, an .electricweft deteetor 'Q switch closable between the time the actuator passes the element ona working stroke and the next shifting of the boxes, and a circuit including the switch and device and closable by a detector indicating weft exhaustion.

9. In weft detecting mechanism for a loom having a lay movable back and forth and having shifting shuttle boxes each of which is active for two picks and then inactive for two picks, an electrical weft detector to have detecting relation with a shuttle box moving to inactive position on a backward stroke of the lay, an element movable to effect a change in the operation of the loom, an actuator having a regular working stroke on box shifting picks of the loom and normally out of engagement with the element, a switch to be closed after the actuator has passedthe element on a working stroke and opened before the actuator reaches the element on the succeeding working stroke, an electromagnetic device to be in series with the switch and the detector when indicating weft exhaustion and effective to cause coactionbe tween the actuator and the element, and means defining a shunt circuit to hold the electro-magnetic device energized when the switch opens.

:10. In weft detecting mechanism for a loom having a lay movable back and forth and having shifting shuttle boxes each of which is active for two picks'and then inactive for two picks, an electric detector rendered effective by shifting of the boxes to detect weft in the shuttle moving to inactive position on a backward stroke of the lay, a regularly moving actuator having a working stroke during the backward movement of each pick of the loom on which box shift- 40 ing-occurs, a switch to be closed at a point in the operation of the loom subsequentto the working stroke of the actuator, the switch remaining closed during part of the time that the detector is in detecting relation with the weft, the switch opening prior to completion of the next shifting of the boxes, electromagnetic means to be actuated when the "switch is closed and the detector indicates v weft exhaustion and effective to cause the actuator to produce a change in the operation of the loom, and means to maintain the electro-magnetic device energized between the time the switch opens and the actuator has its next working stroke.

In testimony whereof I have hereunto affixed my signature.

LEWIS S. VOSE. 

